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Electronic voltage transformer online checking system

A voltage transformer, electronic technology, applied in the field of electronic voltage transformer online calibration system, can solve the problems of live operation danger, unfavorable on-site use, large equipment volume, etc., achieve simple and reliable insulation, ensure accuracy, and can strong mobility effect

Active Publication Date: 2015-07-15
宜昌昌耀电力成套设备有限公司
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Problems solved by technology

However, since the standard transformer adopts the traditional electromagnetic voltage transformer, ferromagnetic resonance may be generated when the live power is connected to the power grid, which brings danger to the live operation
And when the voltage level is high, the equipment is bulky and heavy, which is not conducive to field use

Method used

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  • Electronic voltage transformer online checking system
  • Electronic voltage transformer online checking system
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Embodiment Construction

[0023] Such as Figure 1~Figure 3 As shown, an electronic voltage transformer online calibration system includes four parts: a voltage sensing unit 1 , a signal conversion unit 2 , a signal transmission unit 3 and a calibration platform 4 . The voltage sensing unit 1 is used to obtain a primary voltage signal online, and its output is used as a standard voltage signal. After receiving the synchronization signal sent by the verification platform 4 , the signal conversion unit 2 converts the analog signal of the voltage sensing unit 1 into a digital signal, and transmits it to the subsequent verification platform 4 through the signal transmission unit 3 . The calibration platform 4 simultaneously receives the data of the voltage sensing unit 1 and the voltage transformer to be calibrated, and completes the analysis, processing and error comparison of the two channels of data. The voltage sensing unit 1 and the signal conversion unit 2 are placed in the shielding device 7 . The...

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Abstract

The invention relates to an electronic voltage transformer online checking system which comprises a voltage sensing unit, a signal conversion unit, a signal transmission unit and a checking platform, wherein the voltage sensing unit is used for acquiring a primary voltage signal online; the output of the voltage sensing unit is used as a standard signal; after being processed by the signal conversion unit, the standard signal is transmitted to the checking platform by the signal transmission unit. The electronic voltage transformer online checking system disclosed by the invention uses a ring-shaped electric field sensing array as the voltage sensing unit and can acquire the primary voltage signal under the uninterruptible power condition. The voltage sensing unit does not need to be directly connected with a primary wire, but acquires the primary voltage signal in an electromagnetic induction manner, therefore, normal operation of a line is not influenced, and the problem of ferromagnetic resonance also does not exist.

Description

technical field [0001] The invention relates to an electronic voltage transformer online calibration system, which relates to the field of power system measurement. Background technique [0002] The development of smart grid and the large number of smart substations put into operation have put forward higher and higher requirements for the corresponding measurement technology. Due to the shortcomings of ferromagnetic resonance, poor transient characteristics, large volume, and heavy weight, traditional transformers cannot meet the requirements of modern power systems, and because the output of traditional transformers is analog, the output of voltage transformers is generally 100V / 57.7V , while the current transformer output is 5A / 1A, these analog output forms cannot meet the development direction of measurement and protection digitization. Therefore, electronic transformers based on new sensing principles have been more and more used in smart substations. Electronic trans...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01R35/02
Inventor 李振华胡蔚中黄悦华李振兴徐艳春
Owner 宜昌昌耀电力成套设备有限公司
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